shttpd/worker/alloc.c

// SPDX-License-Identifier: GPL-2.0 or GPL-3.0
// Copyright © 2018-2019 Ariadne Devos
/* shttpd - allocate task structures */

#include "worker.h"
#include <sHT/compiler.h>
#include <sHT/nospec.h>
#include <sHT/test.h>

#include <stddef.h>
#include <string.h>

/* struct sHT_paper_mill is a stack structure. */

sHT_paper
sHT_alloc_paper(struct sHT_paper_mill *mill)
{
	/* sHT_paper_mill is a stack structure */
	if (sHT_zero_p(mill->length))
		return NULL;
	return mill->first[sHT_index_nospec(--(mill->length), mill->capacity)];
}

void
sHT_free_paper(struct sHT_paper_mill *mill, sHT_paper p)
{
	/* From docstring: p must come from mill.
	   Double-freeing is not allowed. */
	mill->first[sHT_index_nospec(mill->length++, mill->capacity)] = p;
}